The spelling of the word "Atheena" can be explained using the International Phonetic Alphabet (IPA) transcription. The sound of "a" in "Atheena" can be represented by the IPA symbol /æ/, which is a short "a" sound. The "th" sound can be transcribed as /θ/ and represents the unvoiced dental fricative sound. The "ee" sound is represented by /i:/ and is a long "e" sound. Finally, the "na" sound can be represented by /nə/, which is a schwa sound followed by the letter "n." Overall, the spelling of "Atheena" can be accurately represented using the IPA transcription system.